PT0-002 Practice Question: Information Gathering and Vulnerability Scanning
This PT0-002 practice question tests your understanding of information gathering and vulnerability scanning. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A penetration tester is using theHarvester tool to gather email addresses and subdomains for a target domain. Which source is theHarvester commonly configured to use for passive reconnaissance?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Google search
TheHarvester is a passive reconnaissance tool that collects emails, subdomains, and other data from public sources without directly interacting with the target. Google search is a primary source because theHarvester uses Google's search engine via its API or scraping to find indexed pages containing email addresses and subdomains, leveraging Google's dorking capabilities for passive data gathering.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Shodan
Why it's wrong here
Shodan is used for scanning internet-connected devices, but theHarvester primarily uses search engines.
✓
Google search
Why this is correct
Google search is a common source for theHarvester to passively collect emails and subdomains.
Related concept
Read the scenario before looking for a memorised answer.
✗
DNS zone transfer
Why it's wrong here
DNS zone transfer is an active reconnaissance technique, not passive.
✗
Social media APIs
Why it's wrong here
Social media APIs are not typically used by theHarvester; it focuses on search engines.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the distinction between passive and active reconnaissance, and the trap here is that candidates confuse Shodan (a passive search engine for devices) with theHarvester's passive email/subdomain gathering, or assume DNS zone transfer is passive when it is an active query that requires direct server interaction.
Detailed technical explanation
How to think about this question
TheHarvester uses Google's Custom Search API or direct HTTP requests to parse search results for patterns like '@domain.com' in email addresses and 'subdomain.domain.com' in URLs. It respects Google's rate limits and robots.txt to remain passive, but excessive queries can trigger CAPTCHAs, requiring careful throttling. In real-world engagements, testers often combine theHarvester with other passive sources like VirusTotal or Certificates Transparency logs to build a comprehensive attack surface map.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A SOC analyst notices unusual lateral movement in the network at 2 AM. The IR playbook dictates: identify and contain (isolate the affected machine), then eradicate (remove the malware), then recover (restore from backup), then document. Skipping containment before eradication risks the attacker regaining access. Questions like this test the sequence and rationale of incident response phases.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this PT0-002 question in full detail.
Information Gathering and Vulnerability Scanning — This question tests Information Gathering and Vulnerability Scanning — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Google search — TheHarvester is a passive reconnaissance tool that collects emails, subdomains, and other data from public sources without directly interacting with the target. Google search is a primary source because theHarvester uses Google's search engine via its API or scraping to find indexed pages containing email addresses and subdomains, leveraging Google's dorking capabilities for passive data gathering.
What should I do if I get this PT0-002 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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